koobas.hobune.stream
Keeping an raycasting AI within a patrol area
I have an AI that uses three Raycasts to detect objects in front of it, picture below for visual reference. When the Raycasts detect a collider, the AI turns to avoid it. Works great, except here's the problem. I need to "fence in" the AI with something with colliders (planes for example) but the player can't walk through anything with colliders on it. Turning the plane's colliders into OnTrigger doesn't do the trick, and I'm out of ideas.
void CheckSurround()
{
Ray forwardRay = new Ray(this.transform.position + _colliderData.radius*transform.right, this.transform.forward);
RaycastHit hitObj;
//eventually replace the number with currentSpeed once the Ai can turn
float distanceCheck = (currentSpeed)*predictTime;
if (distanceCheck != 0 && Physics.Raycast(forwardRay, out hitObj, distanceCheck))
{
//if there's a problem with braking, check the && hitObj.collider.CompareTag("tree") code and make sure it applies to braking
Brake (Vector3.Distance (this.transform.position, Vector3.MoveTowards(hitObj.point, this.transform.position,2f)/distanceCheck));
//Check direction
//Check to the right
Ray rightRay = new Ray (this.transform.position + transform.right, this.transform.forward + (this.transform.right * visionWidth));
RaycastHit rightCheck;
if (Physics.Raycast(rightRay,out rightCheck, distanceCheck) == false && hitObj.collider.CompareTag("tree"))
{
Turn(1f);
return;
}
//Check to the left
Ray leftRay = new Ray (this.transform.position + _colliderData.radius*-transform.right, this.transform.forward + (this.transform.right * -visionWidth));
RaycastHit leftCheck;
if (Physics.Raycast(leftRay,out leftCheck, distanceCheck) == false && hitObj.collider.CompareTag("tree"))
{
Turn(-1f);
return;
}
if (rightCheck.distance > leftCheck.distance)
{
Turn (1f);
}
else
{
Turn (-1f);
}
}
else
{
Accel();
BrakeTurn();
}
}
Maybe you can try making invisible gameObjects. Then, you add them to their own layer. Finally you would use this code.
if(hit.transform.gameObject.layer == fence)
with hit being the variable you store the Raycast information in. It should work because it does not use colliders.
Also you would have to declare it(fence) first.
//This is in JavaScript BTW, should be pretty similar in C#
//Variable
var fence;
//Start()
fence = Layer$$anonymous$$ask.NameToLayer("fence");
